WSL2 , problem with network connection when VPN used (PulseSecure)

[fibu79]

I'm using MS v. 2004 (build 19041) with UBUNTU linux on WSL2.
When I don't use VPN on windows , everything is fine - I have internet connection on windows and wsl2 ubuntu.
But when established connection via VPN (on windows) then on windows still is OK - I have both internet and vpn connection , but on Ubuntu there is no network connection at all (no internet , no vpn access).
I suspect there is a problem with NAT (on Hyper-V default switch)
Any idea what could be wrong ?
Additionally: on wsl1 everything worked fine (also when VPN enabled)

Currently on wsl2 it looks like this :
fibu@DESKTOP-3N4US3P:/mnt/c/Users/fibu2$ ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.30.123.209 netmask 255.255.240.0 broadcast 172.30.127.255
inet6 fe80::215:5dff:fe41:b550 prefixlen 64 scopeid 0x20
ether 00:15:5d:41:b5:50 txqueuelen 1000 (Ethernet)
RX packets 263 bytes 27705 (27.7 KB)
RX errors 0 dropped 1 overruns 0 frame 0
TX packets 223 bytes 34352 (34.3 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
RX packets 2 bytes 56 (56.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2 bytes 56 (56.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

fibu@DESKTOP-3N4US3P:/mnt/c/Users/fibu2$
fibu@DESKTOP-3N4US3P:/mnt/c/Users/fibu2$ ping google.com
ping: google.com: Temporary failure in name resolution
fibu@DESKTOP-3N4US3P:/mnt/c/Users/fibu2$
fibu@DESKTOP-3N4US3P:/mnt/c/Users/fibu2$ netstat -rn
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
0.0.0.0 172.30.112.1 0.0.0.0 UG 0 0 0 eth0
172.30.112.0 0.0.0.0 255.255.240.0 U 0 0 0 eth0
fibu@DESKTOP-3N4US3P:/mnt/c/Users/fibu2$ cat /etc/resolv.conf
nameserver 172.30.112.1
fibu@DESKTOP-3N4US3P:/mnt/c/Users/fibu2$

[fibu79]

Does anyone can help ...?

[WangHaiYang874]

I'm troubling with the samilar problem here. It's frustrating

[aaemon]

same problem, wsl1 working fine, all the distros in wsl2 is not connecting to internet

[akulbe]

I am having a similar issue when I'm on the GlobalProtect VPN connection to our corporate network. One workaround I've found is to add the IP for your router to /etc/resolv.conf as a nameserver entry.

[dys152]

Same here, seems to be intermittent though. Also have docker desktop running and stopping that has fixed it a couple of times but not always.

[yanke1311]

i have the same problem

[carl-berg]

Same problem here. WSL2 can't access internet after connecting to VPN. If I turn it off, things are OK again. Using windows VPN configuration (IKEv2), no special VPN app.

[peterhorvath]

Latest pulse secure vpn client for corp vpn connection and experiencing the same issue.
WSL2 has almost none existent internet connection when connected on VPN

[honeway]

Same issue happens on released Windows 10 2004, run Ubuntu 20.04 on WSL2 when connect to Pulse Secure.

I have tried solutions mentioned in
#1350
Didn’t work to me.

[peterhorvath]

#4277

[petersonsbuild]

same problem for me, cisco anyconnect vpn client running Windows 10 2004 WSL2 Ubuntu 18.04 and 20.04

[peterhorvath]

Interestingly i can curl http sites while on vpn but not https.

[peterhorvath]

okay it is resolve for me, apparently IT had a transparent url filtering proxy when i am connected to VPN and needed bypass, it also works when i set http_proxy/https_proxy and proxy for apt within WSL2 to the corp proxy.

[chazt3n]

@peterhorvath is your anyconnect setup to use full tunnel?

[peterhorvath]

it is pulse secure vpn but yes it is full tunnel.